Drill-sharpener.



W. A. SMlTH. v

DRILL SHARPENER.

APPLICATION FILED JAN.29. 191s.

Patented Dc. 25,1917.

6 SHEETSSHEET l.

w. A. SMITH.

DRILL SHARPENER.

APPLICATION FILED 1AN.29. 1916.

Patented Dec. 25,1917.

6 SHEETSSHEET 2.

W. A. SMITH.

DRILL SHARPENER.

I APPLICATION FILED IAN.29,1916. Y 1,251,484. Patented Dec. 25,1917.

6 ,SHEETSSHEET 3.

W. A. SMlTH.

DRILL SHARPENER. I APPLICATION FILED JAH.29| 1916.

1,251,434, Patented Dec. 25,1917.

6 SHEETS-SHEET 4- W. A. SMITH.

I DRILL SHARPENER.

APPLICATIGN FILED JAN-29. 1916.

Patented Baa. 25, 191?.

' 6 SHEETS-SHEET 6.

QMAM,

*UMTED STATES EPATENT @FFTQE.

WILLIAM A. SMITH, 0F DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELA- WARE.

DBILL-SHARPENER.

Specification of Letters Patent.

Patented Dec. 25, 1917.

Application filed January 29, 1916. Serial N 0. 75,147.

To all whom it may concern:

Be it known that I, \VILLIAM A. SMITH, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented new and useful Improvements in Drill-Sharpeners, of which the following is a specification.

The present invention relates to metal clamping machinery, and while particularly designed as a drill sharpener, has features which may be successfully employed for other analogous purposes.

One of the objects of the present invention is to provide an apparatus of this character that is substantially complete in itself, and in which great power can be obtained with rapidity of action.

In the accompanying drawings Figure 1 is a front elevation of the apparatus, portions being broken away.

Fig. 2 is a side elevation of the same.

Fig. 3 is a top plan view.

Fig. l is a horizontal sectional view sub stantially on the line of Fig. 2.

Fig. 5 is a vertical sectional view substan tially on the line 55 of Fig. a.

Fig. 6 is a detail cross sectional view on the line 66 of Fig. 5.

Fig. 7 is a sectional view on an enlarged scale, showing the pressure controlling mechanism for the hydraulic pump.

Fig. 8 is a detail sectional view of the valve controlling the supply to the vertical hydraulic motor.

Fig. 9 is a similar view of the valve, showing the same shifted to an exhaust position.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment illustrated, a base 10 is employed that is hollow, and forms an exhaust fluid-receiving reservoir 11. Mounted on this base, are angularly disposed workengaging members. One of these members includes an anvil 12 and a reciprocatory hammer or plunger block 13 slid ably mounted on bolts 14, which bolts support a hydraulic motor. This motor comprises a cylinder 15, having ears or sleeves 16, through which the bolts 14; pass, and operating in the cylinder is a piston or plunger 17, which carries at its lower end the said block 13. It will be noted that the anvil 12 and block 13 are provided with shaping dies 18 and also with clamping dies 19.

Formed upon opposite sides of the cylinder 15 are smaller cylinders 20, constituting parts of pneumatic motors, which motors also include pistons having rods 21 connected thereto and projecting through the lower ends of said cylinders, these rods being fastened to the block or head 13.

The other workengaging member, as shown more particularly in Fig. 5, comprises a horizontally slidable dolly 22 mounted in a suitable bearing element 23 and disposed in line with the clamping dies 19. The face 24 of this dolly constitutes a shaping die cooperating with the shaping end portions 25 of the dies 19, as will be readily understood by those skilled in the art. The rear end of the dolly 22 is abutted against by a hydraulic piston 26, which piston operates in a hor'- zontal cylinder 27, forming a second hydraulic motor. A pneumatic motor is located alongside the dolly 22, being placed beneath the same, and comprises a cylinder 28, in which operates a piston 29, the outer end abutting against the outer end of the piston 26. The projecting end of the piston 29 is provided with a cross pin 30, the lower end of which reciprocates in a guideway 31, while the upper end is engaged in a transverse opening 32 formed in the rear end portion of the dolly 22.

Supported by arms or brackets 33, the lower ends of which are held by the bolts 14, is a hydraulic pressure reservoir 34: built to withstand great pressure, and preferably carrying a suitable gage 35. This pressure reservoir has a pipe connection 36 with the upper end of the hydraulic cylinder 15, and located in said connection is a valve casing 37 containing a three-way valve 38. Lead ing from this valve casing 37 is an exhaust pipe 39, which as shown more particularly in Fig. l, communicates with the exhaust-1e ceiving chamber or reservoir 11. A branch pipe 40 leads from the pipe 36 above the valve 88, and communicates with the rear end of the horizontal hydraulic cylinder 27. In this pipe is located a three-way valve e1 corresponding to the valve 38, and an exhaust pipe 12 leads from the valve 41, and also discharges into the exhaust-receiving reservoir 11. The valve 38 is provided with a crank arm 43, which has a link connection 44: with a rocker arm 4:5 on a rock shaft L6. The rock shaft is suitably journaled on the rear side of the base 10. and is provided with an actuating lever lT, the free end of which is forked, as shown at l8. The valve i1 is provided with a crank arm l having a link connection with the rear end of a lever 51 that is fulcrumed between its ends on the rock shaft 46, the opposite end of the lever being also forked as indicated at Journaled upon one side of the base 10 is .a disk 53, to which is secured a handle crank 54:, this disk being located between the free ends of the levers 417 and 51, and having oppositely extending pins 55 and 56 that are arranged to successively engage in the forks 48 and 52 of the levers l? and 51.

On a suitable base 57, located alongside the base 10, is mounted a hydraulic pump, comprising a cylinder 58, in which operates a plunger 59. The intake to this pump consists of a pipe 60 leading from the lower portion of the reservoir 11, and containing a check valve 61, shown in '7. The discharge of the pump is through a pipe 62 leading to the lower portion of the pressure reservoir 34:, and said discharge pipe also contains a check valve 63. It will. thus be evident that when the pump 58 59 is in operation, liquid (preferably oil) will be withdrawn from the reservoir 11 and delivered into the reservoir 34.

In order to prevent abnormal or dangerous pressure in the tank 3%, a pressure relief mechanism is provided shown in detail in Fig. 7. As there illustrated, a branch pipe 64c leads from the pipe 62 above the check valve 63, and communicates with a small cylinder 65 formed in a supporting bracket 66. In said cylinder is a plunger 67 that operates against a lever 68. This lever is fulcrumed at one end, and is yieldingly supported at its other end by a coiled spring 69, the tension of which can be adjusted by a screw 70. The lever 68 bears upon a plunger 71 yieldingly supported by a spring 72, said plunger extending into the pipe 60 in a position to engage the check valve 61. but being normally out of the path of movement of said valve. With this arrangement. it will be evident that under normal conditions, the operation of the plunger will cause the withdrawal of liquid from the reservoir 11 and discharge it in o the reser voir 3 the valve 61 preventing the return of such liquid from the pump to the reservoir 11. If, however, a predetermined pressure is reached in the pipe 62. and consequently in the tank 3%, this pressure will cause the downward movement of the plunger 67 against the action of the spring 69 and spring 72, thereby depressing the lunger 71 which will engage the valve 61 and hold the same from its support. When this takes place, the movement of the piston 59 will be idle as the liquid will simply enter and return through the pipe 60.

The pump piston 59 is connected to a pitman 7 3 operated by an eccentric that is connected to a gear wheel 7%, and this gear wheel is in mesh with a pinion 75 on a shaft of a suitable electric motor 76. The said pinion also in mesh with another gear wheel 77 mounted on the shaft of a small air compressor 78, and this air compressor has its discharge connected to a pipe 7 9, the said pipe 79 delivering into an air tank 80, and having branch 81 connected to the pipe 62. Valves 82 and 83 are located in said pipes for controlling the passage of air therethrough. The air tank has a delivery pipe 84: connected thereto, and said pipe 8t has branches 85 communicating with the lower ends of the pneumatic cylinders 20. Another branch 86 leads to the front end of the pneumatic cylinder 28.

Briefly described, the ope 'atien of the apparatus is substantially as follows: Assuming that the reservoir 11 is nearly full of oil, or other suitable liquid and the reservoir 3st and tank 80 are substantially at atmospheric pressure, it will be evident that if the motor 76 is thrown into operation and the valves 82 and 83 are open, air will be delivered under pressure to the reservoir 3 1 and the tank 80. This pressure may be brought to any desired degree and the oil from the tank 1.1 can then be delivered through the pipe 62 into the reservoir 34, so that this pressure in said reservoir 3% can be enormously increased. lVhen the desired pressure in the tank 3% has been ob tained, if the supply through the pipes 36 and ll) is cut off, the head 13 will he raised and the dolly will be in its retracted position. If, now, a tool, as for example, a drill bit, is placed between the block 13 and anvil 12, and the lever 54, which in its initial position is in the dotted position A of Fig. 2, is turned to the full line p r=siti011 B. the pin will engage in the forked end of the lever 47 and turn the same downwardly. This will operate the valve 38 to tlu position shown in Fig. 8, high pressure is delivered into the vertical hydraulic motor, and the head 13 is brought down quickly and with great force upon the tool. This action may be used either for shaping purposes, or for clamping the tool. accordingly as said tool is placed between the dies 18 or 19. Assuming that is in the latter position. if the movement of the handle 54: is continued to the dotted line position C, the pin 55 will leave the forked end 48 of the lever ll and said lever, and consequently the valve 38 will remain in said position. The pin 56, however. will then engage in the forked end 52 of the lever 51 and move this lever to cause the valve whereupon the liuial under ll to assume a position that allows the fluid under pressure to pass from the reservoir 3st, through the pipe 40, and into the rear end 'of the cylinder 27. As a result, the piston 26 in said cylinder is forced forwardly with great quickness and power, driving the dolly E22 forwardly and causing it to act upon the end of the tool. Upon a reverse movement of the handle crank 54:, the valve 41 is first thrown to its discharge position, cutting oil the supply of fluid through the pipe 40 and opening the exhaust to the pipe as, so that the liquid is now returned into the reservoir 11. It will be noted that during all these operations there is air pressure in the cylinder 28, and also in the cylinders 20. Consequently when the pressure is relieved in the cylinder 27, the pneumatic piston 29 operates against the piston 26 to retract the same, and also cause the retraction of the dolly 22 through the medium of the cross pin 30. A further return movement of the handle crank 54: to the dotted line position A will throw the valve 38 to the exhaust position, as shown in Fig. 9, whereupon the vertical hydraulic cylinder 15 will be relieved of pressure and the pneumatic pistons 21 will operate to again raise the head 13.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size,

- shape, proportion and minor details of construction, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention as defined in the claims.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In apparatus of the character set forth, the combination with work-clamping means and hydraulic actuating mechanism therefor, of coacting upsetting means and hy draulic actuating mechanism therefor, a pressure reservoir, means for placing liquid under pressure in the reservoir, and means connected to the reservoir for distributing such liquid under pressure therefrom to both actuating mechanisms.

2. In apparatus of the character set forth, the combination with angularly disposed work-engaging devices and hydraulic plungers for respectively operating the same, of a pressure reservoir, means for placing liquid under pressure in the reservoir, and means connected to the reservoir for distributing such liquid under pressure therefrom to both the plungers.

3. In apparatus of the character set forth, the combination with angularly disposed work-engaging devices and angularly disposed hydraulic cylinders and plungers for respectively operating said work-engaging devices, of a pressure reservoir, means for placing liquid under pressure in the reservoir, and means connected to the reservoir for distributing such liquid under pressure therefrom to both cylinders.

t. In apparatus of the character set forth, the combination with angularly disposed work-engaging devices and hydraulic plungers for respectively operating the same, of a pressure reservoir, means for placing liquid under pressure in the reservoir, means connected to the reservoir for distributing such liquid under pressure therefrom to both plungers, and mechanism for controlling the distributing means to cause the successive actuation of the two workengaging devices.

5. In apparatus of the character set forth, the combination with angularly disposed worleengaging devices and angularly disposed cylinders and plungers for respectively operating said devices, of a pressure reservoir, means for placing liquid under pressure in the reservoir, conduits leading from the reservoir to the cylinders, valve mechanism in said conduits, and means for actuating the valve mechanism to successively admit the liquid under pressure to the two different cylinders and exhaust it therefrom.

6. In apparatus of the character set forth, the combination with a base, of angularly disposed work-engaging members mounted thereon, hydraulic motors for respectively actuating the members, a pressure reservoir mounted on the base and located above the vork-engaging members, means for placing liquid under pressure in the reservoir, and means for delivering the liquid from the reservoir to the motors.

7. In apparatus of the character set forth, the combination with a base having an exhaust receiving reservoir therein, of angularly disposed work-engaging members mounted on the base above said reservoir, a hydraulic motor for actuating each workengaging member, a pressure reservoir supported on the base above the work-engaging member, means .for pumping liquid from the exhaust receiving reservoir into the pressure reservoir, means for delivering the liquid from the reservoir to the respective motors, and means for controlling the delivery of such liquid to cause the successive operation of the motors.

8. In apparatus of the character set forth, the combination with a base, of angularly disposed work-engaging members thereon, a hydraulic pressure reservoir, a hydraulic exhaust-receiving reservoir, an air tank, hydraulic motors for respectively operating the work-engaging members, an air pump having delivery connections With the hydraulic pressure reservoir and the air tank,

a hydraulic pump having its intake connected with the exhaust-receiving reservoir and its discharge connected With the hydraulic pressure reservoir, means for distributing fluic under pressure from the hydraulic pressure reservoir to the motors, and exhausting it therefrom into the exhaust receiving reservoir, valves controlling said deliveries, means for successively operating the valves, and pneumatic means for moving the work-engaging member in one direction, said means being connected to the air tank.

9. In apparatus of the character set forth, the combination with work-clamping means, of a movable dolly coacting therewith, a piston rear of the dolly for moving it in one direction, and an opposing piston located alongside the dolly for moving said dolly in an opposite direction.

10. In apparatus of the character set forth, the combination with Work-clamping means, of a movable dolly coacting therewith, a piston for moving the dolly in one direction, and an opposing piston engaging the first piston for returning it and having means engaged with the dolly for also returning said dolly.

11. In apparatus of the character set forth, the combination with Work-clamping means, of a movable dolly coacting therewith, a piston. in rear of the dolly and abutting against the same for moving the dolly in one direction, and an opposing piston located alongsice the dolly and abutting against the first piston for returning it, said second piston having a transverse pin engaged with the dolly for moving the same.

12. In apparatus of the character set forth, the combination with Work-clamping means, of a dolly, a hydraulic piston for moving the dolly in one direction, and a gaseous fluid operated piston engaged with the dolly and piston for returning the two.

13. In apparatus of the character set forth, the combination with Work-clamping means, of a dolly coacting therewith, a hydraulic motor including a piston engaging the dolly for moving it in one direction, a pneumatic motor including a piston engaged with the dolly and the hydraulic piston for returning the tWo, a hydraulic reservoir, means for supplying fluid under pressure from the reservoir to the hydraulic motor, an air tank, means for supplying air under pressure from the tank to the pneumatic motor, and means for placing liquid and gaseous fluid under pressure in the reservoir and tank.

14. In apparatus of the character set forth, the combination With angularly disposed work-engaging members and fluid operated motors for actuating the same, of valves for respectively controlling the fluid supply to the mechanisms, actuating levers connected with the valves and having forked ends, and a rotatable disk having a handle and also having projecting portions successively engaging in the forked ends of the levers to successively operate the same.

15. In apparatus of the character set forth, the combination. with a base and a liquid receiving reservoir located therein, of angularly disposed Work-engaging members mounted on the base, hydraulic motors for respectively moving the Work-engaging members in one direction, pneumatic motors for respectively moving the Work-engaging members in the opposite directions, a fluid pressure reservoir mounted on the base above the WOlk engaging members, an air tank, a fluid pump having its intake connected with the reservoir in the base and its barge connected with the pressure reservoir, an air pump having its discharge connected With the air tank and with the fluid pressure reservoir, a motor for operating both pumps, fluid supply connections between the pressure reservoir and the hydraulic motors, fluid pressure connections between the air tank and the pneumatic motors, valves for respectively controlling the fluid supplies to the hydraulic motors, levers connected to the valves for operating the same, and a manually operated device that engages the levers for successively operating them.

16. In apparatus of the character set forth, the combination with angularly disposed Work engaging members and fluid operated mechanisms for actuating the same, of valves for respectively controlling the fluid supply to the mechanisms, actuating means for the respective valves, including a lever connected to one and having a forked end, and a rotatable device for successively operating said actuating means, .aid device including a projection that engages the forked end of the lever to move the same a predetermined distance.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

lVlLLIAM A. SMITH. lVitnesses JAMES R. ELMnNnonr, Jnssin TURNER.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents. Washington, D. C. 

